Common myths busted on World Leprosy Day Know the top 10 myths and facts about leprosy, its symptoms, treatment, and prevention. Bust common misconceptions and spread awareness. Casual social contact does not spread leprosy. Leprosy causes body parts to fall offFact: Untreated leprosy can damage nerves, leading to loss of sensation. Deformities are inevitableFact: Early diagnosis and timely treatment prevent nerve damage and disability in the vast majority of cases.